Safety stop device for stationary steam-engines.



No. 762,249. PATENTED JUNE 7, 1904. I

C. A. OT'I'. SAFETY STOP DEVICE FOR STATIONARY STEAM ENGINES.

APPLICATION FILED 0UT.31. 1903- NO MODEL.

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UNITED STATES Patented June 7, 1904.

PATENT OFFICE.

CHARLES A. OTT, OF LINCOLN, RHODE ISLAND.

SPECIFICATION forming part of Letters Patent No. 762,249, dated June '7,1904.

Application filed October 31, 1903- To a. whom it may concern:

Lincoln, in the county of Providence and State of Rhode Island, haveinvented certain new and useful Improvements in Safety Stop Devices forStationary Steam-Engines, of which the following is a specification.

This invention relates to an electrically-actuated valve mechanismadapted to control the steam in a stationary steam-engine; and theobject of myinvention is to provide an effective device which can beoperated upon'to instantly shut oif the steam from the engine in case ofaccident in any part of the works.

My invention consists in a spring-controlled valve properly mounted andinterposed between the throttleevalvc and the steam-inlet pipe of theengine, electrically-actuated means for releasing said spring-controlledvalve to close upon its seat, and means for relieving the steam-pressureupon said spring controlled valve that the same may be moved to itselectrically-operated position, of the novel construction andcombination of parts, as herein after described, and specifically setforth in the claim.

In the accompanying sheet of drawings, Figure 1 represents a sideelevation of my electrically-actuated valve as applied to thethrottle-valve and steam-inlet pipe of the engine. Fig. 2 is an enlargedcentral longitudinal sectional view showing the throttlevalve,spring-controlled valve, andsteam-inlet pipe, respectively, and saidvalves open as when the engine is in operation. Fig. 3 is a verticalcross-sectional view taken in line X X of Fig. 2, showing theelectrically-actuated mechanism for holding the spring-controlled valveopen, as when the engine is running. Fig. 4 is a similar sectional Viewshowing the relative position of parts of the device as when thereleasing mechanism has been tripped electrically and the spring hasclosed the Valve upon its seat and shutting off the steam from theengine. Fig. 5 is a top plan View of the casing for thespring-controlled valve and showing a by-pass adapted to relieve thepressure of steam against said valve Serial No. 179,398. (NO 1110681.

when the same is to be opened and held to its normal position.

Like letters of reference indicate corresponding parts in the differentviews of the drawings.

Referring to Fig. 2, A represents a tubular casing which is divided by apartition 7), so as to provide two steam-chambers c and c.

Said partition is provided with a circular beveled opening (Z,communicating with the chambers of the casing and forming a seat againstwhich a valve-disk c rests in closing the said opening. The valve-disk cis rigidly secured upon a rod 0, that projects vertically from thecasing, and the lower portion of said rod beneath the said valve-diskeisrnounted and movable in astep f, that is secured in the annularflange Z) integral of the casing. A push-spring f surrounds the rod 6'and isinterposed between the said valve-disk c and said step f. g is apacking-ring interposed between the step f and the annular flange b ofthe casing, and a suitable stuffing-box g surrounds the upper portion ofthe valve-rod a, said stuffing-box being secured upon a projectingannular flange of the casing. The casing A has an integral upwardextension 5 at one side thereof, and the upper extremity of saidextension is bifurcated to receive the end of a swinging arm 7b, whichis connected to the bifurcated end of the said extension by a pin ll.The upper end of the valve-rod a is bifurcated to receive the arm A, anda pin 7L rigid in the bifurcated end of the valve-rod, loosely enters anelongated slot [2, formed in the said arm h, as shown in 3. At theopposite side of the casing A and integral therewith is another upwardextension 6 whose upper extremity has a fixed stud bflupon which isloosely mounted a latch-lever 2'. Said lever has a tongue projection 71at its upper end to engage upon the end of the arm [2 in holding thevalve-disk 0 open or in its normal position, as seen in Fig. 3. b is anouter extension integral of the casing A and arranged to support theelectromagnets 'j. k is a lever having an armature to contact with theamatures of the magnets j j, and this armature-lever It has a tongue isto engage a hook formed on the lower end of the latch-lever i. Thisvalvecasing A, with the tripping mechanism for actuating its valve,-asdescribed, -is adapted to be interposed between the casing Z of theordinary throttle-valve of a stationary steamengine and the steam-inletpipe 021, said valvecasing A being fixedly secured in position by bolts71. 72 which enter through an outer annular flange integral at each endof the said valve-casing A and through the corresponding annular flangeof the throttle-valve casing Z and steam-pipe m, respectively, in themanner as shown in Fig. 2.

Referring to Fig. 1, 0 represents an electric push-button fixedlysecured in a wall of the factory or works, and this button has the usualarmature from which a wire (1 leads to the positive pole of a storagebattery q, and from the negative pole of the battery a Wireq leads toone of the electrically-connected magnetsj. From the other electromagneta wire (1 leads back to the armature of the push-button 0. When thethrottle-valve Z and valve 0 are open, as shown in Fig. 2, the steampasses through-from the inlet-pipe m in the arrow-direction to thesteam-chest of the engine, and as the engine is running the parts whichhold the valve 6 open are in'the position as shown in Fig. 3. Now ifperchance an accident should happen in some part of the factory or worksremote from the engine-roorn as should require the stoppage of theengine, by simply pressing on the push-button 0 causes theelectromagnets jy' to attract the armature of the lever K:, which whencarried down by the magnets disengages itself from the hook of thelatchlever 2'. A pull-spring s, whoseends are connected to thecasingAandlatch-leveri, draws back the latter from engagement with thearm 71, and at this moment the push-spring f instantly forces the valve0 upon its seat 0 to the position of parts as indicated in Fig. 4, thusshutting off the steam from throttlevalve and causing the engine tocease running.

Any number of pushbuttons may be 10- cated at convenient intervals .inthe factory and connected with the device, and by havmg a spring-pressedvalve intermediate of the samemay be forced back and held in its normalposition, as indicated in Fig. 3, I provide a by-pass t, whichcommunicates with the chambers 0 and 0 of the casing, as seen in Figs. 2and 5, and said by-pass has a valve a for the engineer to close afterthe valve 0 has been adjusted to its open position.

Having described my invention, what I claim, and desire to secure byLetters Patent,

In a safety-stop for stationary steam-engines having a steam-inlet pipeand athrottle-valve, the combination, of a device comprising a fixedtubular casingcommunicating with said inlet-pipe and said throttle-valveand divided by a partition having a port; a by-pass communicating withthe said casing at each side of its partition; a movable rod projectingfrom said casing,andcarryinga valve-disk arranged to close the port inthe same; a push-spring interposed between said valve-disk and the saidcasing; an arm pivoted on an extension of the casing, and connected tothe valve-rod of the same; a latchlever pivoted on a support of thecasing and having a hook at oneend and a lugatits-opposite end thereofto engage the free end of said arm; a pull-spring from .the hookportionof said latch-lever-to said casing; a lever pivoted on a supportof the casing and provided with an armature arranged .at one end and-atongue at its'opposite end thereof to engage the hook of saidlatch-lever; electromagnets arranged to attract the armature of saidlever, and a push-button electrically wired to said magnets,substantiallyas shown and .for the purpose specified.

In testimony whereof I aifix'my signature in the presence of twowitnesses.

CHARLES A. OTT. IVitnesses:

WILLIAM H. PECK, FRANK I. SHERMAN.

